Probably not that version, no. The PSP browser is circa 1999 technology for Javascript and I don't think it can handle layers (which is like THE most powerful tool for writing games in Javascript). Maybe in future releases we'll see DHTML support, as well as applets and Flash (wouldn't that be the sh**!?)
Check out this link though (in your PSP):
http://window.terratron.com/~sosman/...ing_block.html
I am really impressed at how this guy wrote something to convert the D-PAD usage in the browser into mouse movements. Right now, the browser only supports mouse movements and clicks. I think this examples opens up the possibility for some neat things in the web browser.
Is anyone out there in 2.0 land interested in any Javascript developing for the PSP browser to simulate a "homebrew" aspect?
Like I said in a previous post, these could be played offline as well. You wouldn't need an internet connection.